Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7b53d35a0415c3fba19eccaea9127eb50cec2f5cbca0837d2a44d70d8544e190' 
  AND token = 'tVm31vkKzdlUS4L70TDrMNmOY/B9A7zPgYr5AlaWHTI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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