SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5032755bdc2e47f8769250f50e606725a72c11df39e41b8f51eed3ef68c19f7b' 
  AND token = 'GmYJ3YUSFEa6h/BT0IjXiECssbMvNr6FplgiVrqJnIo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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