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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4409299f33f75a90522f23988ef56b7b96bb32598d8840a8a9bc705b9c1dc0ff' 
  AND token = 'ADY8ozNIGt441yX8vaK1a1rzKuVo7AIcZxf4va8fc30=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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