Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '71235198912a7c36c71390ef8020940399a2403667eaf628813f0ac8d6461bb3' 
  AND token = 'xa+xr6alaOs4ORu4y9sQ0C8ndrqLKSBVMriDVyxZU9c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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