Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5ed575422f767d984152a881b8f28266955c6bcb363d7cd77b0b5cf7b2298630' 
  AND token = '66fcpCYH5BMVfUH1jLsc7dayyXUODe2IvEhXcrYevIA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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