Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9a817d3897723676365d33fe9da7e55cd1972c59216d0596a6f40e48baeb7309' 
  AND token = 'nbVVRLzGKAmaKMg/WgHTdoNKgTzOqhv2bb3eHSeXbpk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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