Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '93be0325a89ccdf39cf75b90db924045d60c576a18d4db51e500dcc522e7c305' 
  AND token = '2CyTKI3PENP1l3Ota9+HOUzwNLuk7Yw1BrgR8OuJnyU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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