Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '21f4ceef7f66c319d6b80455c55047f96b8a5a87c60593150179e424028557cb' 
  AND token = 'VlCvJ5aWm8p9zvutWgcx7ZUPeVtO10DhFaoXPaj2cp8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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