Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '856c9be01eb819eef7ef8ef29c45e5e4539762cb47d502f471ef96faed2eddd6' 
  AND token = 'TV4/XUfICgoVJlmNkzKZqnN3maSJe3VI4aHq+BTSktU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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