Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'da85f3c75056ac9fcbe0ba2e913de7f317ace584f8428f1d135407a1de787e2f' 
  AND token = 'XjtXI+sfH21XDkwCujadMzr7wB1OMpmPCw3IsVmVmL0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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