Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9fca91812f2456dc80e68bd8566a83eb595a6642a600b3bf00b6d1b83ffccac4' 
  AND token = 'BMeedM13hK/Md1qZuChS1PsiP6wnKsKFYMNcVfbUF98=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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