Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '48324711f88d187792e8a646259e55a1239d3dd61d71577233c94cdfead03a02' 
  AND token = 'SCX2lowhQapfRcK+NfKPFneTg1YT0I6Od7MDTwLYIok=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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