Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c97a8545a1419045e4eb87d0ba184c2acf4763d05cf7eeb8f30200808714e5f1' 
  AND token = 'Ou+r9hcl34BAuUyyBbOyIu9mOyYFb+mmgSMG2cTKpJY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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