Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e61353ff6e5ea9c5ae8979bbccd8f74f16cf8f5073101cf2ce8bf9fc2821c64' 
  AND token = '0Gn+MRBJzbhKXGtBu61jci5ReAOwV/D8GEoByKIbhaA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00132

JSON explain

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