Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b2ca2d26e53eaabf2593d4452ae13aa49bf2cd9bd7c71b2b2d1726cbcdfa7fbe' 
  AND token = 'ybnxH4uzUkBaCSU4cssGclIMhzYlKb+3FGSwSNf8KOA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}