Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eac6507c10d427be607979ac2582fec0c27eee9d22349519250c9d5a5c9af2fc' 
  AND token = 'SRefe8FHtVOdb9fuQlUB0OCGCbQuOWVWpyxjIf3yC7s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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