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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '60cfbd97c27720b39ada83ae0bcd82c740176ec3b6a550ddb1df07eacc340315' 
  AND token = 'NWKBCA3Yq0rmxCAmkTNI5w5M4alzHtEdKtLvBedSCMM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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