Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed321e7f90b9748be9692d50068d16a4ce0cbe335126983fbc8c7561e5b47772' 
  AND token = 'di4RugeuFhd+sIkDyZWZvNpXGjAsX4/XUXDysaAK9t4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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