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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '04d9bd40bbf6d13cc2c44dcb06d36be3505e2db61df8503c0bce9358a12ef22b' 
  AND token = 'JOOZy6aiBhHmCfIVMGpGZoqLPIu033L186TnxJw2k/4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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