Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '990dd6515c35b058f46487586198f6b64135f8f174e30cfa02b8ed8942706fdb' 
  AND token = 'QX2m83w1vbcvfBGXkuzstF5spZSBSQ1Em/sNAC5XQ7Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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