Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf9f81209f97d69e2712b4711a293ed239ec1a6df6edf7e3825312937b2087fa' 
  AND token = 'iwx7vM6JimT5KokG+9mt35xbRf0n1OJC+H8zX4WNSIw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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