Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2e52799ed47ef761cdf8181777c1907adc8a3e61bb4c84e6f7aab0169f546495' 
  AND token = 'b2lWpX/HeQ2DQSegwKqjugAsQwN8qfhKTxK9m4+Leyk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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