Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e1ff766bf637acdf24d6e29b4157b7096bbec3f5267a3c7b28df22bb55bd5a82' 
  AND token = 'tH5syfKy6ltSd0OaFrj2CLncp2Toh2N5iEbDpe9IVuo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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