Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6617c4edd0f6dec2f035daa74998d242670b2e7effb0d05031ad67bb9bffacb5' 
  AND token = 'FmXWfqcpAKp60N1IfiYhu/tAjsQQD9I0ZtGmeK4CAcw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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