Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a8cb1779ae3508b0f60c1d1383b2175842be78988044627f9906e01cd6df9624' 
  AND token = 'W5vAFAHs4ZRikKWvrD8DKXJafSNYxSucoYb4gnLuK88=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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