Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0a16be63fd742f350993c5463d55cea87ab956cee83f6d3810935abd74244706' 
  AND token = '2FrIzXeecsNhRXuACa6o2b3XXfOYCJqkispsHkyaGMA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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