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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7d452014a20bb4cb7f5713247a85771084258a0e9e5c2111f1b61c081fecb623' 
  AND token = 'yrs0OHtoa4yPQOFvEo1OdnYXNlqoX56WjJv4K1d799Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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