SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7395a61bc56e39c898e5c376fe536f17f60821420316c4b0625e264114257b60' 
  AND token = 'YPqfdGNk9d0loUCLSN+8PuWnhGgMeBsmZLR8blpeGqY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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