Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b3e2038a40b5c225a70b3655106f74426c7d7890428078e23fcbf7cef2e04e02' 
  AND token = '86XySXs9tmwf/zJerDtzb+pdAA0aiXl1qNngIEDbOQM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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