Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6d5a8cf569744499d8cf9d426c594f2e7549ccc9ff5a316487f5b2df6f8f0aed' 
  AND token = 'LlnKZ3qwZGGF1ooAPIHYlrbNRA2RLOmoVfqeXn6f8NE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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