Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '93c0758a9fba69a0f4d7833fb55d016a2b6e2caad4c59f5057b64e2bdfa66826' 
  AND token = 'SIO7wrAc7VHzRWKinDm+uvtLUtAIQI+e3vEFwRUxEAU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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