Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cab81e57e186616c212b890ddfd1f17ee54e8d904368e7ad2da8beb0ac6edaf8' 
  AND token = '6P1VEFLuiL2HHpyOt+pcVULECtkVt09y61qt5Qp4OjE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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