Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '27b7a1ea3d9457195258311928efba04d2282bb3d7ac60fea791cec8db97f546' 
  AND token = 'UrtZZW1wjU+dHl2D1d9IgeY6pbuXVdRrRrQ1Wf8J0yE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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