Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4763a3124bf371e9a29d89ce73ff79c157aab2aa18ad9f80c78d5cfe594a7e84' 
  AND token = 'tw2EJjDIrort07K1jVvljYY/dMevXP6JxobtSoRvS1c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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