Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0fd973a8d154c0cad6fc0583bfca49d4902c3980ca579a6f6b2242fe298ef5b4' 
  AND token = 'imjZjKah7pgnUPAl0j1OlvKuRRJr4iZM5pTa8vBCd80=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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