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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0896919006b3d828deba1e9935c3b500f6e5b25953c0ddf90abf19333583f4ec' 
  AND token = 'cTwW90TvTqz+Pjb8Gm/BCVAd0nPFKXWBuZ05959BzjE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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