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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e0fcc433bbb6547bbae4edb0f73181788c0598992753caf806b3b7630c007230' 
  AND token = 'QpH/k0D6SAArC3tEB94erlGQjFGedh/zA9yjJTsX908=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}