Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '58a38cf2ee81fac6f00fb68af0ad9998dc1d2dbd4be798a3da5feeef656e433f' 
  AND token = '2OI86KWUSjP7Ssn2ggGuMIfImydc8IU2Oz8gmxwZLok=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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