SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3825131fc739ed1c64cf526f35c920d67818eacf85248bf5e8320cb0ef51b143' 
  AND token = 'wrhphCqMFVzrnX3ZHmZNNKqW+fuKC3n/zDF/FDETZ5w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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