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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9fee62f3553d709178b834af8c69defc5a2d4e2009bb06a52aba1bd448c790d1' 
  AND token = 'eb1OolEN/dAyYk9mcRaF9nKzPyJU/UVo7mZ9Wu7dwMI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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