Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fd001e88c3bac4d716282b0fe1e5a82a1c50190fea8df4c7ea005a9216e3841d' 
  AND token = 'JMZFvesLlSRWxbqukM3Plt83DfV1P59y6CXVu9GxfLs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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