Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a85c00925411697486ec7f0d5777f54dbb221fcee664ddb5704b4c49ad94cac7' 
  AND token = '03lsPDxKnaO2Eg7+icBKx0twqlaNzrf9M0hrtH5Xang=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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