SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '711c0311ac76f621dca9457bb51f1c4d7a5f56037a8a567ab31806d426a6eb4f' 
  AND token = 'BIq0P/akh6A+8m6ydsJIms8p+o3chCcXYCvxVWM+LgQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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