Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8eceee477131c49ce6be9fd3f0d04e6c0ac290ad88b2b416a96af38d00a30625' 
  AND token = 'sLZhYeTRqukOdwNR6qVD74jNETo0FOxtTv0exC6ajno=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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