Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '637dca8b136fbba2c24c5de25e63a0edbd00bcf7f8a3f19a70e7939b529a66df' 
  AND token = 'HDyNpUUDBkQIMrTw89s/RP9arJp8k4DplqklGxqpjVw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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