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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd1ba09bfc5b852f88aa272b6ca621221903712e361170aaf96c9f3b8dce88ff9' 
  AND token = 'AIhZWoh2brU2hcXTjsiONaMBHWMzQXdpoIjdOPXlMMU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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