Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e22ef2e6804e56600d5aea2d1a44427d5ee67bdc9e024d41f2cf0ecd4b0dccb4' 
  AND token = 'gL1Efp+BBsvJAwasrM1izVp73ANpQRs0+b6bPwBoLMA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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