Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd19e60dd6e4b6e565837087903863a236c52508f162384926e43ee762744552f' 
  AND token = 'vosaP/e5C0YitMeCYyDmnkkSRnTGeNBxkwFS9GVZuag=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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