Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0f75369cdc98b2887d443c38a16ca27ae2449852dfec72ec219816914596d3b1' 
  AND token = 'Q4kQtkWNSNOIgGNEtrncJenAx2HW4SJiZLt4/vjVXno=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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