Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2fd526f392fd2715ef05f8c1a1cf230db5bbebb0406a2083c68f23325bfb86c7' 
  AND token = 'eJut6JU2rf5vGmmcytzRugq3xjlbiWcXbM821UbBFEA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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