Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e3e1ff1bfde180558e023ffcd0e8bb8467d6230ef0e8b33e7fcf01755f07480' 
  AND token = '83iz9280A5tAxyydVLKppLJAz/0/Y3vZFLYP9vCP1H4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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