Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5534dd7d0d8e960c2be84baabc956647deb1b88e98c11a3f7f726d6ee2959063' 
  AND token = 'FRC448lSUgT5NsRFc1fazYyfj/9SCko/ypOSWfuHdAY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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