Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '029157c8b1e6f2751a095be9756b0b6d9335aba60700f0f9bc5677afac235b03' 
  AND token = 'do3hvhd/R3qe2vmQIeP7DTEOD0jQIjjh6pQupiBVHRI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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