Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '27cddfac7269d73ae2b8a59dc2e95618da09c9758260b14a6c508328c8808499' 
  AND token = 'pH3nlzAcpgrGB5ZXYWtlhMj8Fh4uKW6WMTNYfrVE6s8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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