Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3f63dab0a506215686be6338c4038fe8bf407009ce83a36619fcb98394a7a346' 
  AND token = 'NKMDordeZgTCDxCfcJxP1EHdfBY80l/lBEevJjXspKQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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