Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1c3733f5a613989fdb149fb9ea3e240668e99c22b46ec30df823f16fc5fcbee9' 
  AND token = 'sFBRObkrirWKEnoLvYg2t8qJEHkdU3NzViWKFry4lmc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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