Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eec884f40f48436791906d54933993b881bec279faf2ac0a63c0243d818b9615' 
  AND token = 'j4wX9IfOFlnhzCkyg3EuXwzzn3q/5h/0jbZ6XM3Tbps=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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