Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3142a28997e1e0a5ae27bfe072cd9527b12c20a6aaf143983f4a6ba283bbaef8' 
  AND token = 'rM5Lh31IGlrWdyGhvvnobR6Jj9wDILq2JbYuAgdiMPQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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