Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06b2c732af4702574047317961948f8f5935fd17e652146120b599fda8ceb070' 
  AND token = 'cb5Bsaa1coWwcCocwxzLIJvZtysRUbdXYzOGt0IZxOk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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