Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0956677960280ad3900af5fcfbcf476bd9315f0e73426c2bd476616a6692c332' 
  AND token = 'OjQVtpmP0zJk0MoCGx6mtE9uKMPj+IOwkea3moxoL2E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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