Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b93ee857a5ee65c043649bb4ca88467ba2d34cbe4563d1c9b9b9807e6673e962' 
  AND token = 'cUvORVDsWMx0vV1sJsqG4HVDz22IpJM+C2zn4bOKNME=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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