Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ce4b06e599c2cb1ef4371c781871a4cdaa4da543c3f46dff359462820fa4c371' 
  AND token = 'GTq2BxoUuzif2AW2+n83ErOVThz6NtIb8qu7L30SyY0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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