Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bedb4bb2e4f8ae4d72fa68177ff60b27947ecab2fa24aa6afdd23d9b96c8f284' 
  AND token = '+nTOh0gcZNEAEIJb0exL0IaLibgdRZjHJtqvEMzN7zs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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