Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11b23eee01d1ee0b79c0767dfcafacda440612eb52c06dbd356478a58b768f17' 
  AND token = 'MtHt0tkyVOra0v59DJ1gxJWf1xiMLLKdGrnAcANL6FY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}