Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b6894c8541d81d62e8ef3b99794fe8e5ce97f71aaa31f6f6ad36b051943ed076' 
  AND token = 'TnEzsyumaKNL3RlRrQ1jueCnNCDc/wfWuLLibiZVNes=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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