Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bc3034a4d7697a464b94dd4aeeb8ec6cf2399838658b82f5308e6614880522ee' 
  AND token = 'Unl7Mke0agp4fXpisx+zUyFaOOmkir3GkLscWUP27hg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}