Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3e25db15df6dee46b70a4de52faf0c0523b1ef0126fb0e0ec42347cface5264d' 
  AND token = 'dkkrpZ4T3MNSqUjulWFXOH3BOUl5GOADIJ4PTC4SDF8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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