Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '688c2e5a7db722ff87b8889acc4100ba1282cc9a052072244ff1973aeceffb74' 
  AND token = 'CxHVi0F00ld4WMDqi5G5Y9sDSRFJoM8rHDEflHmRxAc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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