Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c91e5f47be738764c5d51038c772d6c652ecec2244437944a0989b99cc098984' 
  AND token = 'EXbtyOXeW36wNiSZYVUNSzr22VkkU49zU/yLLRvqkqY=' 
  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"
    }
  }
}