Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd862d394d87d9ffa891d74c881da8e5f95bb55a7d4d54f5cb19f79696479a6af' 
  AND token = 'wqEfPar5nc8bKh3gusML7KDSM0dirM1zpp5unFgYljM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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