Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ce8f853ea6497f0e259549a1edae04e4f94ecc76dc82f54d13a963cf28e01639' 
  AND token = '33mUgJeOuOVG9IM62JEggyV+fmGG5eXjdzNtVEZrbds=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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