Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '10b8a64e674ef95445892cab44edd13f64fdb21eedbbe311f618eed1ef18081a' 
  AND token = '/uYM/Bk9SOH2PpTX0a8an9SnejRcQpmCJJ44ZKZ/gGQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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