Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6878cb221627f7eb7c60253e10b5f7e3100c58351b1d577ded8247a2757eb170' 
  AND token = 'c7hExXeDZ8KO/3bKyfZc53cppDdUyq38tCBZjvNyyyM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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