Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'de77d5dcc2f5d5221ac468a6223907706a85028c6b9a8b85d267b4143243acd4' 
  AND token = 'Fmm+7iwIq4PiUXbY71asO56vRRq+pUXLGCWyxI2fEH8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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