Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd3f205677100120f55f3e5302fde7cee518bd77c3319f67662cf3c41390fa8de' 
  AND token = 'oFL6Eh3h+S98RKzJ46t30Udx806bKEuXMmdb4DMVEJo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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