Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '250214c72931abc1d7462d6e2f6bc2467f9f823ac31ddd16c46c99dcb8c973c8' 
  AND token = 'LJHE8falezwO3gCwh/EwZOMGNVWL3zjeoQ/fopyO4Go=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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