Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '15b9b409417b7dcc38271f5a73ea05d42c37b90a1c82170e7df0a2dc4f86ef2e' 
  AND token = 'Fc2XC83pZQvwq9pKR/4nduWLpkMdHd6/L0NNW2J9wbI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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